Unable to expand "filename.zip" into "Desktop". (Error 1 - Operation not permitted.) or Unable to unarchive "filename.zip" into "Desktop". (Error 1 - Operation not permitted.). On Mac OS X, you should simply be able to double click on the zipped file to unzip/extract, except with zip password protected files... :::::::Compressed (i.e., archived or zipped) files may contain many separate files in one large archive, which often take up less space than the original files. Before you can read or run all the separate files and programs, you must use an archiving program to extract the files from the archive.:::::::::::::: StuffIt® Zips Everything! StuffIt provides better compression and encryption on more platforms on more types of files AND has better backup features. StuffIt is the ultimate file compression utility, the only one you need. Compress It. Secure It. Send It.

First, double check to make sure the Syntheway ZIP file has fully downloaded. If the
file size has fully downloaded then there are two options to overcome this
error message:

1) Unzip in Terminal

One solution is to use Terminal, a program included with
all versions of Mac OS X. It is located in the Utilities folder within the
Applications folder. When launched, it provides a line interface to
control the underpinnings of the UNIX based operating system.

1) Open Terminal. You can use the Mac search at the top right and start
typing Terminal. It will appear, click on it to open the program.

2) Type “unzip” and a space, then drag/drop the zip file into the Terminal
window.

3) Press Enter and the zip file will be unzipped, storing all files on
your computer.

Your unzipped files will go to your user account folder which you can
easily access using Finder.

2) Use Zipeg to Unzip:

Mac not able to open password protected zip file by default Archive
Utility. If the zip file is password protected, you need third party tools
to open the zip file or use the Terminal program.
To open password protected zip in Mac OS X, follow the steps below: